Back rest for cots



Nov. 12, 1935. L. w. WILLIAMS BACK RESTFOR COTS Filed Nov. 15, 1954 2 Sheets-Sheet l Nov. 12, 1935; L, w, WILLIAMS 2,020,754

BACK REST' FOR COTS Filed Nov. 15, 1934 2 Sheets-Sheet 2 1/? Z QQ- a L. WWiZliamS,

Patented Nov. 12, 1935 UNITED STATES PATENT OFFICE 3 Claims.

My invention relates to improvements in back rests for cots, and tions, constructions described and claimed.

An object of my invention is to provide a back rest which is readily attached to or detached from the ordinary canvas cot.

A further object is to provide a back rest which can be folded into a compact roll.

A further object is to provide a back rest having a frame which will support a flexible memapart while it is being used.

A further object is to provide a device of the type described in which the back rest may be inclined at various angles and firmly held in its adjusted positions.

Other objects and advantages will appear in the following specification and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings forming part of this application, in which:

Figure l is a perspective view of a cot provided with my improved back rest.

Figure 2 is a detailed view showing the means for connecting the inclined part with the back rest.

Figure 3 is a longitudinal sectional view through the back rest support.

Figure 4 is a sectional view along the line 44 of Fig. 3.

Figure 5 is a view showing the frame of the back rest in its folded position.

Figure 6 is a. sectional view along the line 6-6 of Fig. 1.

Figure 7 is a sectional view along the line 11 of Fig. 5, and,

Figure 8 is a sectional view along the line 88 of Fig, 1.

In carrying out my invention I make use of any ordinary cot. In Fig. 1 such a cot is shown having side rails I and 2 respectively, legs 3, and anend rail 4. It will be understood that a similar end rail, not shown, is at the opposite end. These canvas cots usually have cut away portions 5 at their ends.

My improved back rest comprises a frame member 6 which is arranged to be disposed parallel with the end member 4 of the cot, and which is hingedly attached thereto by means of hooks 1, at each end, which pass through the cut-away portions 5, and which partially envelscrewed to the frame member l2 ope the member 4. These hooks, as will be observed in Fig. 1, are rigidly secured to one face of the frame member 6. A side frame member 8 is provided and this frame member is pivotally attached to the frame member 6 at the point 9 by means of L-shaped members iii on opposite sides of the frame member 8. These L-shaped men bers iii are so arranged that when the frame is in use the end of the frame member 8 abuts the inner side of the frame member 6. 1-.)

At the opposite end of the frame member 8 are secured L-shaped members H, the ends of which are disposed on either side of an end frame member i2. This end frame member is pivotally connected atl3 to the L-shaped members H. The frame member I2 is provided with a socket Ho and with a groove l2b, see Fig. 5, extending from the socket toone endof the frame member.

The frame member 6 is also provided with a socket 6a arranged to receive the reduced portion Ma, see Fig. 6, of a frame member M. This frame member has a reduced portion Mb at the opposite end arranged to enter the socket I'M.

A sheet of canvas or the like, [5, is provided, having a loop 85st at one end arranged to receive the end member l2, and having a loop I511 at the other end arranged to receive the frame member 6. The rear of the frame member I2 is provided with a metal attaching member i6 which is through the canvas loop I590 which covers it, as clearly shown in Fig. 2. This attaching member is provided with slots I1 to receive the laterally extending portions i8 of a fixture i9 which is attached at the end of a rod 20.

The slots l1 are enlarged at their ends so that the members l8 may be passed into the slots, when the rod 20 is substantially parallel with the slots, and then the rod may be turned into the position shown in Fig. 2 so as to bring the laterally extending members I8 into such position as to prevent withdrawal through the slots until the rod is raised again substantially parallel with the slots. This rod 20 has a companion member 2i, having a guide member 22 secured thereto, and arranged to hold the member 2i in substantial registration with the rod 20. The latter is provided with a guide 23 which is arranged to slid ably receive the member 2| and it is provided with a ,movable follower 24 which can be clamped The member 2! has preferably at its end a rubber foot 26 to prevent slipping.

From the foregoing description of the various parts of the device the operation thereof may be readily understood.

The operative position of the back rest is that shown in Fig. 1. The support member 2| is adjusted to the proper right angle and is firmly clamped and the rest may be used in the manner or a chair back, or it may constitute a pillow support. 7 a

When it is desired to fold the device so as to bring it within small compass, the support is swung until the members 20 and 2| are in alinement with the slots [1 when the support may be detached by withdrawing it out 01' the slots. The

frame as a whole may be detached from the end piece 4 by disengaging the hooks 1. The end of the frame member l2 adjacent to the frame member H is grasped with one hand and the frame member I! with the other and they are sprung apart far enough to permit the reduced portion of the member H to clear the socket 12a and to enter the groove l2b when, by pulling outwardly, the frame member 14 will be'released.

The frame member [2 may thereupon be folded inwardly parallel with the member 8 and the frame member 6 may be folded inwardly to bring the parts into position shown in Fig. 1. With the members 12. and 6 in this position'the canvas is then pulled out at the side in triangular form and the members 20 and 2| of the support can be loosened so as to slide together, and these members, together with the loose member l4, may

be wrapped in the canvas with the three frame members 6, 8, I2 into a compact bundle.

In setting up the back rest the bundle is unwrapped, the end of the member I4 is inserted in the socket Ma and the other end is brought into registration with the groove lZb, when, by pushing inwardly on the frame member [4 the latter will move until the reduced portion 14b will spring into the socket Na and the frame will be in substantially rigid condition. The support may be attached by bringing it parallel with the slot 11, after entering which it may be inclined at an angle, and the members may be adjusted to hold the back rest at the desired inclination.

I claim:- 7

1. The combination with a cot having an end rail, of a back rest comprising a side member, end 6 members pivotally connected with said side member, said end members being limited in movement in one direction by said side member, hooks carried by one of said end members for engaging the cot rail, said end members being provided with 10 sockets, a second side member having reduced portions arranged to enter the sockets of the end members, and a hinged detachable support secured to the rear of one of said end members.

2. The combination with a cot having an end 15 rail, of a back rest therefor comprising a side member having an L-shaped bracket on each side of said side member at each end thereof, an end member pivotally connected between the brackets at each .end, said end members being arranged .20 to swing into engagement with the ends of said side member, and to be limited in the swinging movement by such engagement, each of said end members having a socket, one of said end members having a groove extending from its socket 25 to the outer end, a second side member having reduced portions arranged to enter the sockets in said end members, a fabric sheet having loops adapted to encircle the end frame members, and

an extensible detachable support secured to one 80 a of said end members for adjusting the angular position of the back rest. V

3. The combination with a cot having an end rail, of a back rest comprising a side member, end members pivotally connected with said side 5 member, said end members being limited in movement in one direction by their engagement with said side members, hooks carried by one of said end members for detachably engaging the cot rail, said end members being provided with sock- 4-0 ets, a second side member having reduced portions arranged to enter the sockets or the endv members, anda support extending from the floor to the back rest.

LELAND W. WILLIAMS. 46 

